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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2007

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Effect of different extrusion temperature and speed on extrusion welds

Bingöl S., Keskin M. S.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 23, nr 2

39-42

Purpose: In this study, it is aimed to investigate the structure of seam weld and transverse weld sections comparatively. To achieve this, it is studied on an extrusion profile type which has seam weld and transverse weld regions. Design/methodology/approach: Producing extrusion profile has been performed by a press, which has a capacity of 1460 tones, in a real producing and carried out by changing the exit temperature and ram speed, which are the important parameters. Exit temperature TE, is chosen as 440, 475, 500, 520 and 560 degrees centigrade. Extrusion speed is also taken in the base of ram speed VR, and production is carried out at the speeds of 2, 4, 6, 10 and 15 mm/s. Therefore the effects of extrusion parameters on macrostructure properties have been investigated. Findings: It is seen clearly that some differences are occurred from the viewpoint of structural features between the regions, when the experimental results are observed without regarding the extrusion parameters. In addition, it was observed commonly the structure of the material had a change through re-crystallization with increasing temperatures. This situation decreases the significance of seam weld regions. But insignificancy of seam weld region is designed as possible as can be from the viewpoint of decorative. However, when the macro structural figures have been investigated as the ram speed increases more significance on seam welds occurs. Research limitations/implications: Also some macrostructural differences in extrusion welds may occur for between having the other important extrusion parameters such as pressure and extrusion ratio. Therefore, effect of the other parameters can be investigated in future. Practical implications: In application, extrusion welds occur on both solid and hollow profiles. Moreover, extrusion temperature and speed often changes. This study shows that these parameters effect to macrostructure of extrusion welds. Originality/value: In this study, it is seen that different macrostructural properties take place due to the process parameters variations and natural of extrusion method in the extrusion production.